US PATENT SUBCLASS 392 / 308
.~.~ For heating liquid


Current as of: June, 1999
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392 /   HD   ELECTRIC RESISTANCE HEATING DEVICES

*  DD  HEATING DEVICES (CLASS 219 SUBCLASS 200) {11}
307  DF  .~ Combined with nonelectric heating means (e.g., gas, etc.) {3}
308.~.~ For heating liquid


DEFINITION

Classification: 392/308

For heating liquid:

(under subclass 307) Subject matter wherein the heating device is for heating a substance in that state in which the particles move freely among themselves but without tendency to separate.

SEE OR SEARCH THIS CLASS, SUBCLASS:

311+, for heating liquid by fluid-in-circuit type heater.

441+, for tank or container type liquid heater.

465+, for continuous flow type fluid heater.

SEE OR SEARCH CLASS

122, Liquid Heaters and Vaporizers, appropriate subclasses for liquid heaters and vaporizers.

126, Stoves and Furnaces, 344+, for water heaters.

165, Heat Exchange, appropriate subclasses for heating liquid by utilizing heat exchange.

237, Heating Systems, appropriate subclasses for heating liquid by heating systems.